Integrated reconfigurable optical add-drop multiplexer

Abstract

The invention discloses an integrated reconfigurable optical add-drop multiplexer. A reconfigurable optical add-drop multiplexer unit adopts a cascade adjustable double microring resonator as a basic unit and comprises a plurality of cascade adjustable double microring resonators, wherein each cascade adjustable double microring resonator comprises two straight waveguides which are not crossed and two disc waveguides with different radiuses; the two disc waveguides are positioned between the two straight waveguides and keep preset coupling distances with the two straight waveguides; and a preset coupling distance is also kept between the two disc waveguides. In the invention, mature process techniques are used, so the element has a compact structure and has high expandability and stability; a method of cascading double rings with different radiuses is used to expand a free spectrum range (FSR), so the number of channels is increased and the information throughput of the element is increased; the stability of the element is improved by using the filter characteristic of a double ring flat top; the resonance wavelength can be adjusted dynamically by using the thermo-optic effect to adjust microrings; and thus, the reconfigurable optical add-drop multiplexer if formed.

Description

technical field [0001] The present invention relates to an integrated reconfigurable optical add / drop multiplexer (Reconfigurable Optical Add / Drop Multiplexer, ROADM). A series of tunable microring resonators (MRR) with smaller radii are arranged two-dimensionally around the microring resonator (MRR). Background technique [0002] The 21st century is an information age with the network as the core. With the rapid development of science and technology, the amount of information transmission in the field of communication has exploded. The ordinary electrical signal network has been difficult to meet the rapid increase in the amount of information transmission. As the basic network of information transmission, the optical information transmission network provides strong technical support for the development of the information age. In recent years, it has received extensive attention from researchers and has achieved considerable development. contribute. Optical network is bas...

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Problems solved by technology

[0002] The 21st century is an information age with the network as the core. With the rapid development of science and technology, the amount of information transmission in the field of communication has exploded. The ordinary electrical signal network has been difficult to meet the rapid increase in the amount of information transmission.

With the improvement of technology and structure, the transmission loss of nanowire waveguides is continuously reduced. At present, there are reports of nanowire waveguides with losses less than 3dB / cm. Although the value is relatively large, the device area based on nanowire waveguides is small, so The overall transmission loss of the device is not large

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